For example, it can be Post status. Click the drop-down list and choose one of the options: Published, Scheduled, Draft, Pending, Private or Trash. Choosing Publish means that only published posts will have featured images generated.

You can also set up featured images for post types: Posts or Pages.

If you want featured images to be generated for a certain category of posts, select this category from the third drop-down list (for example, Animals).

Sometimes, you need to set up featured images for posts created within a certain period. If so, just specify value range (for example, February 1, 2019).

Once you’ve finished changing the settings, press Generate featured images and check the result. The featured images displayed in the posts within certain criteria (if defined). A progress bar shows you the progress of the featured image generation.